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Air quality · Anambra, Nigeria

Onitsha Air Quality Index (AQI) today

Modelled estimate for 14:00 local time (UTC+1), refreshed 3 Nov, 07:52 UTC+0.

73 Moderate

Live estimate · modelled

US EPA AQI14:00 UTC+1, 3 Nov Main pollutant: PM2.5

Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.

This page uses EPA’s NowCast, which follows the last few hours, as the US government’s AirNow does. On a 24-hour average of particles, as many apps show, it is 88.

Over the next 24 hours the model expects the AQI to range from 59 around 14:00 to 126 around 22:00 (3 Nov).

363rd most polluted of 849 cities worldwide right now, 12th of 22 in Nigeria.

What to do today

  • Long walk or run outside OK, lighter if very sensitive
  • Kids playing outside OK
  • Airing the house Open
  • Mask outdoors Not needed

Based on the US EPA’s health statement: “Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

15:00 · 74 16:00 · 73 17:00 · 75 18:00 · 96 19:00 · 125 20:00 · 114 21:00 · 102 22:00 · 100 23:00 · 107 00:00 · 105 01:00 · 93 02:00 · 88 03:00 · 85 04:00 · 83 05:00 · 83 06:00 · 87 07:00 · 93 08:00 · 89 09:00 · 84 10:00 · 80 11:00 · 78 12:00 · 77 13:00 · 75 14:00 · 73 15:00 · 71 16:00 · 71 17:00 · 74 18:00 · 79 19:00 · 96 20:00 · 110 21:00 · 117 22:00 · 126 23:00 · 126 00:00 · 117 01:00 · 106 02:00 · 97 03:00 · 92 04:00 · 89 05:00 · 88 06:00 · 88 07:00 · 91 08:00 · 84 09:00 · 76 10:00 · 70 11:00 · 63 12:00 · 60 13:00 · 60 14:00 · 59 15:00 · 61 16:00 · 63 17:00 · 69 18:00 · 75 19:00 · 88 20:00 · 122 21:00 · 144 22:00 · 153 23:00 · 154 00:00 · 151 01:00 · 141 02:00 · 134 03:00 · 130 04:00 · 121 05:00 · 112 06:00 · 103 07:00 · 99 08:00 · 94 Now

US EPA AQI per hour, UTC+1. Particles use EPA’s NowCast (a 12-hour weighted average), ozone and CO an 8-hour average. Lighter bars are the CAMS forecast.

Show as a table
TimeAQI
Mon 15:0074
Mon 16:0073
Mon 17:0075
Mon 18:0096
Mon 19:00125
Mon 20:00114
Mon 21:00102
Mon 22:00100
Mon 23:00107
Tue 00:00105
Tue 01:0093
Tue 02:0088
Tue 03:0085
Tue 04:0083
Tue 05:0083
Tue 06:0087
Tue 07:0093
Tue 08:0089
Tue 09:0084
Tue 10:0080
Tue 11:0078
Tue 12:0077
Tue 13:0075
Tue 14:00 · Now73
Tue 15:00 · Forecast71
Tue 16:00 · Forecast71
Tue 17:00 · Forecast74
Tue 18:00 · Forecast79
Tue 19:00 · Forecast96
Tue 20:00 · Forecast110
Tue 21:00 · Forecast117
Tue 22:00 · Forecast126
Tue 23:00 · Forecast126
Wed 00:00 · Forecast117
Wed 01:00 · Forecast106
Wed 02:00 · Forecast97
Wed 03:00 · Forecast92
Wed 04:00 · Forecast89
Wed 05:00 · Forecast88
Wed 06:00 · Forecast88
Wed 07:00 · Forecast91
Wed 08:00 · Forecast84
Wed 09:00 · Forecast76
Wed 10:00 · Forecast70
Wed 11:00 · Forecast63
Wed 12:00 · Forecast60
Wed 13:00 · Forecast60
Wed 14:00 · Forecast59
Wed 15:00 · Forecast61
Wed 16:00 · Forecast63
Wed 17:00 · Forecast69
Wed 18:00 · Forecast75
Wed 19:00 · Forecast88
Wed 20:00 · Forecast122
Wed 21:00 · Forecast144
Wed 22:00 · Forecast153
Wed 23:00 · Forecast154
Thu 00:00 · Forecast151
Thu 01:00 · Forecast141
Thu 02:00 · Forecast134
Thu 03:00 · Forecast130
Thu 04:00 · Forecast121
Thu 05:00 · Forecast112
Thu 06:00 · Forecast103
Thu 07:00 · Forecast99
Thu 08:00 · Forecast94

Pollutants this hour

  • PM2.5 19.5 µg/m³ 24-hour mean 29.2 µg/m³ · 1.9× WHO’s 24-hour guideline (15) 73
  • PM10 25 µg/m³ 24
  • O₃ 113 µg/m³ 37
  • NO₂ 1 µg/m³ 0
  • SO₂ 1 µg/m³ 0
  • CO 0.27 mg/m³ 3

Modelled concentrations at the city’s location (CAMS). The sub-index uses the same averaging as the headline, so the highest one is the AQI.

Nearby cities

City AQI
Enugu Enugu State 82
Benin City Edo State 63
Aba Abia State 62
Warri Delta 61
Port Harcourt Rivers State 55
Akure Ondo State 62
Osogbo Osun State 70

Where this number comes from

The Copernicus Atmosphere Monitoring Service (CAMS) forecasts air pollution worldwide on a grid (about 11 km over Europe, about 45 km elsewhere). We take the grid value at Onitsha’s coordinates and score it with the US EPA’s method. It is a model, not a measurement: a nearby monitoring station can read quite differently, especially next to busy roads or during fires and dust storms.

Full methodology · Data: CAMS via Open-Meteo (CC BY 4.0); city list: GeoNames (CC BY 4.0).

  • Good 0–50
  • Moderate 51–100
  • Unhealthy for sensitive groups 101–150
  • Unhealthy 151–200
  • Very unhealthy 201–300
  • Hazardous 301–500

Questions

What is the AQI in Onitsha right now?
73 on the US EPA scale (Moderate) at 14:00 UTC+1, 3 Nov. PM2.5 is the pollutant with the highest sub-index. This is a modelled estimate from the Copernicus Atmosphere Monitoring Service (CAMS), not a reading from a monitoring station.

Is it safe to exercise outside in Onitsha today?
For most people, yes. The EPA’s statement for “Moderate”: Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. General guidance, not medical advice.

Will the air in Onitsha get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 59 around 14:00 to 126 around 22:00 (3 Nov). Forecasts beyond a day are less certain.

How does Onitsha compare with other cities?
Right now it is the 363rd most polluted of 849 cities we track worldwide, and 12th of 22 in Nigeria, all on the same US EPA scale.

Why does another app show a different AQI for Onitsha?
Apps differ in source (government stations, low-cost sensors or a model like this one), in scale (US EPA, European, or a national index) and in averaging (hourly or NowCast, 8-hour, 24-hour). This page uses the US EPA AQI with EPA’s NowCast for particles, computed from the CAMS forecast for the city’s location.